CVE-2021-3631
Published: 2 March 2022
A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libvirt Launchpad, Ubuntu, Debian |
focal |
Released
(6.0.0-0ubuntu8.16)
|
| upstream |
Released
(7.6.0-1)
|
|
| trusty |
Needs triage
|
|
| xenial |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| impish |
Not vulnerable
(7.6.0-0ubuntu1)
|
|
| hirsute |
Ignored
(end of life)
|
|
| bionic |
Released
(4.0.0-1ubuntu8.21)
|
|
| jammy |
Released
(7.6.0-0ubuntu3)
|
|
| kinetic |
Released
(7.6.0-0ubuntu3)
|
|
| lunar |
Released
(7.6.0-0ubuntu3)
|
|
|
Patches: upstream: https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.3 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |